142
Fig. 5.10 Two possible pathways for dimethylammonium dimethylcarbamate hydrogenation to
methanol. In path A, dimethylammonium dimethylcarbamate is hydrogenated into dimethylformamide; then dimethylformamide is hydrogenated to methanol with cleavage of a C–N bond. In
path B, dimethylammonium dimethylcarbamate is dissociated into NHMe 2 (Me = CH 3 ) and carbon
dioxide; this carbon dioxide is then hydrogenated into formic acid which is then converted into
dimethylformamide. (Reprinted from Rezayee et al. (2015) with permission of American Chemical
Society)
Fig. 5.11 Reaction steps for carbon dioxide capture and in situ hydrogenation to methanol via
polyamine utilization. Formamides were formed as intermediates before their hydrogenation step.
(Reprinted from Kothandaraman et al. (2016) with permission of American Chemical Society)
D. P. Minh et al.